PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-17:13:00
G02     70.0           24.0                1.2 +/-   38.10       2.3 +/-   38.10  0.030 / 0.260
G05     48.0           52.5                3.7 +/-   24.81       4.5 +/-   24.81  0.030 / 0.050
G12     183.2          20.4                3.7 +/-   40.15       8.0 +/-   40.15  0.050 / 0.270
G13     119.4          23.6                3.9 +/-   37.40       7.9 +/-   37.40  0.050 / 0.040
G15     156.3          22.4                4.0 +/-   38.22       8.4 +/-   38.22  0.090 / 0.380
G18     222.0          12.5                1.9 +/-   39.11       5.1 +/-   39.11  0.060 / 0.190
G20     218.8          73.4                5.7 +/-   24.49       5.9 +/-   24.49  0.070 / 0.300
G21     282.4          27.1                0.0 +/-   38.47       0.1 +/-   38.47  0.110 / 0.180
G25     219.6          40.9               11.6 +/-    4.48      16.6 +/-    4.48  0.100 / 0.390
G29     346.3          72.3                8.5 +/-    3.04       8.9 +/-    3.04  0.070 / 0.280